CN101476791B - Air conditioning system - Google Patents
Air conditioning system Download PDFInfo
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- CN101476791B CN101476791B CN2008101252930A CN200810125293A CN101476791B CN 101476791 B CN101476791 B CN 101476791B CN 2008101252930 A CN2008101252930 A CN 2008101252930A CN 200810125293 A CN200810125293 A CN 200810125293A CN 101476791 B CN101476791 B CN 101476791B
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- aperture
- cold
- expansion valve
- producing medium
- bloating plant
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
- F24F11/83—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers
- F24F11/84—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers using valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B41/00—Fluid-circulation arrangements
- F25B41/30—Expansion means; Dispositions thereof
- F25B41/31—Expansion valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2600/00—Control issues
- F25B2600/25—Control of valves
- F25B2600/2513—Expansion valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2700/00—Sensing or detecting of parameters; Sensors therefor
- F25B2700/21—Temperatures
- F25B2700/2115—Temperatures of a compressor or the drive means therefor
- F25B2700/21151—Temperatures of a compressor or the drive means therefor at the suction side of the compressor
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2700/00—Sensing or detecting of parameters; Sensors therefor
- F25B2700/21—Temperatures
- F25B2700/2115—Temperatures of a compressor or the drive means therefor
- F25B2700/21152—Temperatures of a compressor or the drive means therefor at the discharge side of the compressor
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2700/00—Sensing or detecting of parameters; Sensors therefor
- F25B2700/21—Temperatures
- F25B2700/2116—Temperatures of a condenser
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2700/00—Sensing or detecting of parameters; Sensors therefor
- F25B2700/21—Temperatures
- F25B2700/2117—Temperatures of an evaporator
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Thermal Sciences (AREA)
- Fuzzy Systems (AREA)
- Mathematical Physics (AREA)
- Signal Processing (AREA)
- Air Conditioning Control Device (AREA)
Abstract
In an air conditioning system, a first expansion device and a second expansion device playing a different role from each other are controlled in a different control method suitable for each role, thereby improving the performance and stability of the system. Furthermore, the control method for the first expansion device is differentiated according to the operation state of the air conditioning system, thereby improving the stability of the system. Furthermore, the intermediate pressure can be adjusted more rapidly and precisely according to the state of the air conditioning system by differentiating the control method for the first expansion device for adjusting the intermediate pressure depending on the degree of superheat of the refrigerant, thereby improving the stability and performance of the system. Furthermore, the first expansion device is gradually opened by controlling such that a change in opening degree may change according to the opening time of the first expansion device, thereby improving the stability of the system and achieving more stable switching of the control method for the first expansion device.
Description
Technical field
The present invention relates to a kind of air-conditioning system, and relate more specifically to a kind of performance and the stable air-conditioning system that can improve system.
Background technology
In general, air-conditioning system be used for by cold-producing medium is compressed, condensation, expansion and evaporation come equipment that the interior space is freezed or heated.
Air-conditioning system is divided into the conventional air-conditioning that comprises off-premises station and the indoor set that is connected with off-premises station and comprises the combined air conditioners of off-premises station with a plurality of indoor sets that are connected with off-premises station.And air-conditioning system is divided into by only driving that the cold-producing medium circulation comes only to provide the refrigeration air-conditioner of cooling air to the interior space and by optionally drive cold-producing medium circulates provides cold or hot-air to the interior space cold/hot air-conditioning also two-wayly along direction.
Air-conditioning system comprises compressor, condenser, expansion valve and evaporimeter.From cold-producing medium condensation condenser that compressor is discharged, in expansion valve, expand then.Cold-producing medium after the expansion evaporates in evaporimeter, is inhaled in the compressor then.In refrigerating operation or heating operation, gaseous refrigerant is injected in the compressor, has therefore improved performance.
But the problem that exists according to the air-conditioning system of prior art is that it is unstable that system can become, and if be not subjected to correct control then occur compressor damage etc. easily.
Summary of the invention
The object of the present invention is to provide a kind of air-conditioning system, it can improve the performance and the stability of this system.
The invention provides a kind of air-conditioning system, comprising: condenser, it is used for condensating refrigerant; First bloating plant, it is used for the cold-producing medium of throttling by described condenser; Second bloating plant, it is used for the cold-producing medium of throttling by described first bloating plant; Evaporimeter, it is used to evaporate the cold-producing medium by described second bloating plant; Compressor, its be used to compress by the cold-producing medium of described evaporimeter and between described first bloating plant and described second bloating plant cold-producing medium of injection after the shunting; And control module, the target aperture that it is used to detect the value of at least one operating parameter and determines described first bloating plant based on the storage setting value corresponding with the value of detected operating parameter.
In the present invention, compressor comprises: first compression unit, and it is used to compress the cold-producing medium by described evaporimeter; And second compression unit, its be used to compress by the cold-producing medium of described first compression unit and between described first bloating plant and described second bloating plant cold-producing medium of injection after the shunting.
In the present invention, control module is measured the degree of superheat of cold-producing medium in real time, and changes the aperture of described second bloating plant based on the degree of superheat of measuring, and reaches the default degree of superheat up to the degree of superheat of measuring.
In the present invention, described at least one operating parameter is a plurality of operating parameters, and described a plurality of operating parameter changes the target aperture of described first bloating plant independently.
In the present invention, described control module is controlled, and makes the variation of aperture change according to time of opening of described first bloating plant, reaches the target aperture up to the aperture of described first bloating plant.
In the present invention, described control module is carried out the maintenance process of the aperture of aperture after the aperture of described first bloating plant reaches the change process of target aperture and keeps change that changes described first bloating plant.
In the present invention, at least some change processes, the variation of aperture is controlled so as to according to the time of opening and changes, and in described maintenance process, aperture is held time to be controlled so as to according to aperture and changed.
In the present invention, described control module is stored the current aperture of described first bloating plant in real time, if and the value of at least one operating parameter drops on outside the default normal operation range, then described control module is controlled described first bloating plant with the method for controlling security that is used to change opening based on the current aperture of being stored.
In the present invention, in described method of controlling security, determine to proofread and correct aperture based on the value of described operating parameter, and control the opening of described first bloating plant by described correction aperture is combined with the current aperture of being stored.
In the present invention, if the degree of superheat of cold-producing medium drops in the preset range of the target degree of superheat, then described control module carries out fuzzy control to the opening of described first bloating plant.
In order to realize the above-mentioned purpose of air-conditioning system of the present invention, carry out first bloating plant of different task each other and control with the different control methods that are applicable to each task with second bloating plant, improved the performance and the stability of system thus.
In addition, in the present invention, the control method that is used for first bloating plant has been improved the stability of system thus according to the mode of operation of air-conditioning system and difference.
In addition, in the present invention, by distinguish the control method that is used for first bloating plant that is used to regulate intermediate pressure according to the degree of superheat of cold-producing medium, can accurately regulate intermediate pressure more rapidly according to the state of air-conditioning system, improved the stability and the performance of system thus.
In addition, in the present invention, little by little open first bloating plant by controlling, thereby the variation of aperture can change according to the time of opening of first bloating plant, improved the stability of system thus and realized being used for the more reliable switching of the control method of first bloating plant.
Description of drawings
Comprise being used for further understanding the present invention and, and be used for illustrating principle of the present invention with specification in conjunction with in this application and constitute its a part of accompanying drawing and demonstrate embodiments of the present invention.In these accompanying drawings:
The view of Fig. 1 demonstrates the structure according to the air-conditioning of first embodiment of the invention;
Fig. 2 is a block diagram, demonstrates the control flow of air-conditioning;
Fig. 3 demonstrates the flow of refrigerant in the heating operation of air-conditioning;
Fig. 4 demonstrates the flow of refrigerant in the refrigerating operation of air-conditioning;
Fig. 5 is a precedence diagram, demonstrates the method for first and second expansion valves of control air-conditioning as shown in Figure 1;
Fig. 6 is a precedence diagram, demonstrates at the air-conditioning according to first embodiment of the invention to be in the control method that heating operation pattern following time is used for first expansion valve;
Fig. 7 is a precedence diagram, demonstrates at the air-conditioning according to four embodiment of the invention to be in the control method that heating operation pattern following time is used for first expansion valve;
Fig. 8 is a precedence diagram, demonstrates at the air-conditioning according to fifth embodiment of the invention to be in the control method that heating operation pattern following time is used for first expansion valve;
Fig. 9 is a precedence diagram, demonstrates at the air-conditioning according to sixth embodiment of the invention to be in the control method that heating operation pattern following time is used for first expansion valve;
The figure of Figure 10 expresses according to the variation with the time of opening of first expansion valve of the aperture of sixth embodiment of the invention;
Figure 11 is a precedence diagram, demonstrates first control method that is used for first expansion valve when the air-conditioning according to seventh embodiment of the invention is in the refrigerating operation pattern; And
The figure of Figure 12 expresses according to the variation with the time of opening of first expansion valve of the aperture of seventh embodiment of the invention.
The specific embodiment
Air-conditioning system comprise just be used to carry out the ordinary residence refrigeration air-conditioner of refrigerating operation, just be used to carry out heating operation the heating air-conditioning, be used to freeze and the heat pump air conditioner of heating operation and being used to freezes and heats the combined air conditioners of a plurality of interior spaces.Below, will be to being elaborated as the heat pump air conditioner of an example of air-conditioning system (below be called " air-conditioning ").
Below with reference to accompanying drawings embodiments of the present invention are described.
The view of Fig. 1 demonstrates the structure according to the air-conditioning 100 of first embodiment of the invention.Fig. 2 is a block diagram, demonstrates the control flow of air-conditioning 100.
With reference to Fig. 1 and 2, air-conditioning 100 comprises compressor 110, indoor heat converter 120, outdoor heat converter 130, first expansion valve 141, second expansion valve 142, phase-splitter 150 and cross valve 160.Indoor heat converter 120 is used as evaporimeter and is used as condenser in heating operation in refrigerating operation.Compressor 110 is compressed into high-temperature high-pressure refrigerant with the low-temperature low-pressure refrigerant that is imported.Compressor 110 comprises first compression unit 111 and second compression unit 112.The cold-producing medium that 111 compressions of first compression unit import from evaporimeter, and 112 mixing of second compression unit and compression are from the cold-producing medium of first compression unit 111 and the cold-producing medium that injects by shunting between evaporimeter and condenser.But, the invention is not restricted to this, and compressor 110 can have the sandwich construction more than three layers.
Phase-splitter 150 is divided into gaseous refrigerant and liquid refrigerant with the cold-producing medium that is imported, and liquid refrigerant is given evaporimeter and given second compression unit 112 with gaseous refrigerant.First connecting portion 151 of phase-splitter 150 is connected by the 3rd tube connector 173 with indoor heat converter 120.First connecting portion 151 is used as the liquid refrigerant discharge pipe in refrigerating operation, and is used as the refrigerant inlet pipe in heating operation.
First and second expansion valves 141 and 142 and the aperture of injection valve 143 by control module 200 controls that are used to control the air-conditioning operation.
Fig. 3 demonstrates the flow of refrigerant in the heating operation of air-conditioning.
With reference to Fig. 3, the high temperature and high pressure gaseous refrigerant of discharging from compressor 110 imports to the indoor heat converter 120 by cross valve 160.In indoor heat converter 120, gaseous refrigerant is by the condensation with the heat exchange of room air.Condensed refrigerant throttling in first expansion valve 141 imports in the phase-splitter 150 then.By the throttling in second expansion valve 142 once more of phase-splitter 150 isolated liquid refrigerants, import to then in the outdoor heat converter 130.Cold-producing medium in outdoor heat converter 130 evaporates by carrying out heat exchange with surrounding air, and the cold-producing medium after will evaporating imports in first compression unit 111.
Inject if require to carry out gas during heating operation, then control module 200 is opened injection valve 143.Along with opening of injection valve 143, will be injected into second compression unit 112 from phase-splitter 150 isolated gaseous refrigerants by ascending pipe 180.In second compression unit 112, the cold-producing medium of injection and be compressed then from the refrigerant mixed of first compression unit 111.Refrigerant compressed is circulated again into cross valve 160 in second compression unit 112.
Fig. 4 demonstrates the flow of refrigerant in the refrigerating operation of air-conditioning.
With reference to Fig. 4, the high temperature and high pressure gaseous refrigerant of discharging from compressor 110 imports to the outdoor heat converter 130 by cross valve 160.In outdoor heat converter 130, gaseous refrigerant is by carrying out heat exchange and condensation with outdoor gas.Throttling condensed refrigerant in second expansion valve 142 imports in the phase-splitter 150 then.By the quilt throttling once more in first expansion valve 141 of phase-splitter 150 isolated liquid refrigerants, import to then in the indoor heat converter 120.Cold-producing medium in indoor heat converter 120 evaporates by carrying out heat exchange with surrounding air, and the cold-producing medium after will evaporating then imports in first compression unit 111.
If there is not the requirement of injecting gas during refrigerating operation, then control module 200 is closed injection valve 143, therefore prevents to be injected in second compression unit 112 from the gaseous refrigerant of phase-splitter 150.But, the invention is not restricted to this, and in refrigerating operation, also can be injected in second compression unit 112 from the gaseous refrigerant of phase-splitter 150.
Fig. 5 is a precedence diagram, demonstrates the method for first and second expansion valves of control air-conditioning as shown in Figure 1.
With reference to Fig. 5 the method for control according to the air-conditioning of first embodiment of the invention described below.
The cooling and the heating interior space if the user drives air-conditioning 100, then control module 200 detects and drives instruction.
Detecting when driving instruction control module 200 initialization, first and second expansion valves 141 and 142 and injection valve 143 (S1).
That is to say that control module 200 is opened first and second expansion valves 141 and 142 fully, and close injection valve 143.By closing injection valve 143, can prevent that liquid refrigerant from importing in the compressor 110 in the driving starting stage.
In case finished the initialization of first and second expansion valves and injection valve 143, then control module 200 is regulated the degree of superheat, makes the cold-producing medium of air-conditioning 100 can reach the default target degree of superheat.In addition, regulate cold-producing medium and make it the intermediate pressure that reaches default.
At this, the degree of superheat is the temperature of cold-producing medium in being drawn into compressor 110 and poor with respect between the saturation temperature of the evaporating pressure of evaporimeter.Can measure the degree of superheat with the compressor inlet temperature sensor 184 that is installed in the entrance side place of compressor by the sensor that is installed in the evaporimeter.As the sensor that is installed in the evaporimeter, when heating, adopt the outdoor heat converter sensor 186 that is installed in the outdoor heat converter 130, and when heating, use the indoor heat exchange sensor 185 that is installed in the indoor heat converter 120.
Intermediate pressure is the pressure in phase-splitter 150.By intermediate pressure being adjusted to the intermediate pressure that reaches default, can reduce the required work of compressor 110, therefore improved efficient.Can regulate intermediate pressure from the refrigerant amount that condenser offers phase-splitter 150 by adjusting.Can calculate intermediate pressure from the temperature of measuring by the implantation temperature sensor 183 that is installed in the ascending pipe 180.
Control module 200 is regulated the opening that is located at the valve between phase-splitter 150 and the evaporimeter so that regulate the degree of superheat.Also have, control module 200 is regulated the opening that is located at the valve between condenser and the phase-splitter 150 so that regulate intermediate pressure.
Control module 200 is used to regulate the valve and being used to of the intermediate pressure of cold-producing medium and regulates the valve of the degree of superheat of cold-producing medium with the control of different control method.In other words, control module 200 with the aperture of the first control method control valve so that regulate intermediate pressure, and with the opening of the second control method control valve different with first control method so that regulate the degree of superheat etc. of cold-producing medium.
With reference to Fig. 5, control module 200 checks that air-conditioning 100 is in the heating operation pattern or is in the refrigerating operation pattern, and selects the method (S2) of control first expansion valve 141 and second expansion valve 142 between first and second methods.
The method that to control first and second expansion valves 141 and 142 at first, below when being in the heating operation pattern at air-conditioning 100 describes.
If air-conditioning 100 is in the heating operation pattern, then control module 200 is controlled first expansion valve 141 with first control method, and controls second expansion valve 142 (S3) with second control method.
If air-conditioning 100 is in the heating operation pattern, then 141 throttlings of first expansion valve import to the cold-producing medium in the phase-splitter 150 after the condensation in indoor heat converter 120.At this moment, can make that the pressure in phase-splitter 150 reaches default intermediate pressure by the opening of regulating first expansion valve 141.Therefore, control module 200 is controlled first expansion valve 141 with first control method.
In addition, 142 throttlings of second expansion valve are from phase-splitter 150 and import to cold-producing medium in the outdoor heat converter 130.Can regulate the degree of superheat of cold-producing medium by the opening of regulating second expansion valve 142.Therefore, control module 200 is controlled second expansion valve 142 with second control method.
Fig. 6 is a precedence diagram, demonstrates first control method that is used for first expansion valve when as shown in Figure 1 air-conditioning is in the heating operation pattern.
With reference to Fig. 6, in first control method (S10), when the initialization of first expansion valve 141 is finished (S1), detect the value (S11) of at least one operating parameter, and calculate the storage setting value (S12) corresponding with the value of detected operating parameter.Set value to determine the target aperture (S13) of valve according to this.The target aperture of first expansion valve 141 is determined according to this setting value.Operating parameter can comprise poor, the discharge pressure of compressor 110 between the indoor temperature, outdoor temperature, indoor and outdoors temperature of frequency, the air-conditioning 100 of operability that cold-producing medium is injected into the gas in second compression unit 112 and injects, compressor 110, the discharge temperature of compressor 110 etc.Preestablish the setting value that is used for operating parameter and be stored in control module 200 according to the form of form.Can differently set the setting value of the frequency that is used for compressor 110 according to the operability that gas injects.
The setting value of operating parameter changes the target aperture independently.The follow-up method that obtains the target aperture is as follows:
Target aperture=F (A1, A2, A3, A4, A5 ...)
Wherein A1～A5 is the value of operating parameter.F (A1, A2, A3, A4, A5 ...) can represent by following formula.
In one example, can obtain the target aperture by will the setting value corresponding multiplying each other each other, and can adopt following formula with operational parameter value:
F(A1，A2，A3，A4，A5，...)＝C＊f(A1)＊f(A2)＊f(A3)＊f(A4)＊f(A5)＊...，
Wherein C is a proportionality constant, and f (A1), f (A2) ... for being used for A1, the setting value of A2....
Because these operating parameters change the target aperture of first expansion valve 141 independently, thus obtain easily to be used for the setting value of each operating parameter, and control easily.
As mentioned above, in case determined the aperture of first expansion valve 141, then control module 200 increases or reduces opening, reaches target aperture (S14) up to the aperture of first expansion valve 141.
Therefore, the intermediate pressure of cold-producing medium can more promptly reach default intermediate pressure.
Simultaneously, second control method reaches the target degree of superheat and comes the method for control valve opening according to the measured degree of superheat up to the degree of superheat of cold-producing medium for the degree of superheat of measuring cold-producing medium.Can be by being installed in outdoor heat converter 130 the outdoor heat converter sensor 186 in---it is used as evaporimeter in heating operation---and compressor indoor temperature transmitter 184 measure the degree of superheat of cold-producing medium.Variation based on the difference between the degree of superheat of measuring and the default target degree of superheat and this difference stores fuzzy table in control module 200, and determines the opening of second expansion valve 142 from this fuzzy table.
As mentioned above, the opening of second expansion valve 142 changes continuously based on the degree of superheat of measuring in real time, therefore the degree of superheat that can regulate cold-producing medium according to the mode of operation of air-conditioning 100 more accurately.
On the other hand, the method that will control first and second expansion valves 141 and 142 below when being in the refrigerating operation pattern at air-conditioning 100 describes.
If air-conditioning 100 is in the refrigerating operation pattern, then control module 200 is controlled first expansion valve 141 with second control method so that regulate the degree of superheat, and controls second expansion valve 142 so that regulate intermediate pressure (S4) with first control method.
If air-conditioning 100 is in the refrigerating operation pattern, then 141 throttlings of first expansion valve are from phase-splitter 150 and import to cold-producing medium in the indoor heat converter 120.Therefore, can regulate the degree of superheat of cold-producing medium by the opening of regulating first expansion valve 141.Therefore, control module 200 is controlled first expansion valve 141 with second control method.
When controlling first expansion valve 141 with second control method, the opening of first expansion valve 141 changes continuously based on the degree of superheat of measuring in real time.Therefore, can more accurately regulate the degree of superheat of cold-producing medium.
In addition, 142 throttlings of second expansion valve import to the cold-producing medium in the phase-splitter 150 after the condensation in outdoor heat converter 130.Therefore, can make that the pressure in the phase-splitter 150 reaches default intermediate pressure by the opening of regulating second expansion valve 142.Therefore, control module 200 is controlled second expansion valve 142 with the first control method S10.
When with first control method (S10) control, second expansion valve 142, set value the target aperture of setting second expansion valve 142 based on the storage corresponding with detected operational parameter value.The opening of second expansion valve 142 reduces once or increases, and reaches the target aperture up to the aperture of second expansion valve 142.Therefore, can more promptly regulate the intermediate pressure of cold-producing medium.
In the present invention,, then control first expansion valve 141, simultaneously,, then control first expansion valve 141 with second control method if air-conditioning 100 is in the refrigerating operation pattern with the first control method S10 if air-conditioning 100 is in the heating operation pattern.On the contrary,, then control second expansion valve 142, simultaneously,, then control second expansion valve 142 with the first control method S10 if air-conditioning 100 is in the refrigerating operation pattern with second control method if air-conditioning 100 is in the heating operation pattern.Therefore, with the heating operation pattern and different, and therefore control method dissimilates, and has improved the performance and the stability of system thus according to the refrigeration of air-conditioning 100 for first and second expansion valves 141 and 142 task.
Simultaneously, no matter refrigeration and heating operation pattern check that all whether requiring to carry out gas injects (S5).
Carry out the requirement that gas injects if exist, then control module 200 is opened injection valve 143.On the other hand, if there is no carry out the requirement that gas injects, then control module 200 is closed injection valve 143 (S7).
Optionally, in second embodiment different, can obtain the target aperture by following formula with first embodiment.Below explanation concentrate on difference between these and the aforementioned embodiments.
Target aperture=F (A1, A2, A3, A4, A5 ...)
Wherein A1～A5 is the value of operating parameter.F (A1, A2, A3, A4, A5 ...) can represent by following formula.
F(A1，A2，A3，A4，A5，...)＝C1＊f(A1-A1_s)+C2＊(A2-A2_s)+C3＊(A3-A3_s)+...，
Wherein C1, C2... are proportionality constant, and A1_s, and A2_s... is for being used for A1, the reference value of A2..., and C1* (A1-A1_s) is for being used for the setting value of A1.
In other words, can be by setting value phase Calais acquisition target aperture each other.In the equation above, obtain the target aperture, therefore be more prone to by the feasible control of each setting value to first bloating plant by combination setting value linearly.
Optionally, in three embodiment different, can obtain the target aperture by following formula with aforementioned embodiments.Here, will the difference with aforementioned embodiments be described.
Target aperture=F (A1, A2, A3, A4, A5 ...)
Wherein A1～A5 is an operating parameter numerical value.F (A1, A2, A3, A4, A5 ...) can represent by following formula.
F(A1，A2，A3，A4，A5，...)＝C1＊f1(A1)+C2＊f2(A2)+C3＊f3(A3)+...，
Wherein C1, C2... are proportionality constant.
In above-mentioned formula, (f1, f2 f3...) represent the actual characteristic of operational parameter value, so have improved control accuracy can to pass through to adopt each constant.
To the control method according to first and second expansion valves of the air-conditioning of four embodiment of the invention be described below.Following explanation concentrates on the difference with first embodiment.The Reference numeral identical with first embodiment represented identical member.
Be that with the difference of first embodiment control module 200 controls first bloating plant according to the mode of operation of air-conditioning with different control methods.That is to say that any among control module 200 selection first control method S20 and the method for controlling security S30 also controlled first bloating plant.
If air-conditioning is in the heating operation, then first expansion valve 141 is used as first bloating plant of regulating intermediate pressure, and second expansion valve 142 is as second bloating plant of regulating the degree of superheat.
Fig. 7 is a precedence diagram, demonstrates the control method that is used for first expansion valve when the air-conditioning according to the 4th embodiment of the present invention is in the heating operation pattern.
With reference to Fig. 7, when the initialization of first expansion valve 141 is finished (S1), control module 200 is regulated the opening of first expansion valve 141 so that regulate intermediate pressure.At this moment, control module 200 selects among the first control method S20 and the method for controlling security S30 any also to control first expansion valve 141 according to the mode of operation of air-conditioning 100.That is to say control module 200 judges whether air-conditioning 100 is in normal operating state, and switch the control method that is used for first expansion valve 141 according to the result.If the value of operating parameter is in the default normal operation range, then control module 200 judges that air-conditioning is in the normal operating state, and controls first expansion valve 141 with the first control method S20.Otherwise if the value of operating parameter drops on outside the default normal operation range, the control method that then is used for first expansion valve 141 switches to the method for controlling security S30 different with the first control method S20.
The temperature of the cold-producing medium of the discharge temperature of control module 200 detecting operation parameters---the cold-producing medium of for example discharging from compressor 110 and the indoor heat converter 120 by heating operation, being used as condenser.If the detected value of operating parameter drops on outside the default normal range (NR), then control module 200 is judged and may be had for example problem of liquid compression, so control module 200 switches to the method for controlling security S30 that can prevent liquid compression etc.
At first, if the value of operating parameter drops in the default normal operation range, judge that then air-conditioning 100 is in the normal operating state, and carry out the first control method S20.
In the first control method S20, the value of detecting operation parameter (S21), and calculate the storage setting value (S22) corresponding with the detected value of operating parameter.According to this setting value, determine the target aperture (S23) of first expansion valve.In case determine the target aperture, then increase or reduce opening once, thereby the aperture of first expansion valve 141 can reach target aperture (S24).Therefore, the intermediate pressure of cold-producing medium can more promptly reach default intermediate pressure.
Control module 200 the first control method S20 the term of execution store first expansion valve 141 current aperture (S25).When the first control method S20 switches to method of controlling security S30, use the current aperture of in the first control method S20, being stored.
The first control method S20 the term of execution, whether control module 20 detecting operation parameters---for example the temperature of the discharge temperature of the cold-producing medium of discharging from compressor 110 and the cold-producing medium by indoor heat converter 120---drop on (S26) outside the default normal operation range.Drop on outside the predetermined operations scope, then if control module 200 switches to method of controlling security S30 from the first control method S20 to operating parameter---for example the temperature of the discharge temperature of the cold-producing medium of discharging from compressor 110 and the cold-producing medium by indoor heat converter 120---.
Control module 200 measures the cold-producing medium discharge temperature of compressors 110 so that the discharge temperature of the cold-producing medium that obtains to discharge from compressor 110 and prevent liquid compression.If the cold-producing medium discharge temperature of measuring drops on outside the default normal operation range and is lower than preset temperature, then control module 200 switches to method of controlling security S30 from the first control method S20.Normal operation range is default and be stored in the control module 200 according to the operating condition of air-conditioning etc.
When the first control method S20 switches to method of controlling security S30, at the term of execution current aperture of being stored of the first control method S20 combine with correction aperture in method of controlling security S30 (S32).Can determine to proofread and correct aperture (S31) according to the cold-producing medium discharge temperature.Control the opening (S33) of first expansion valve 141 according to the associated value of current aperture and correction aperture.That is to say, can add that current aperture increases the opening of first expansion valve 141, perhaps can proofread and correct the opening that aperture reduces first expansion valve 141 by from current aperture, deducting by proofreading and correct aperture.
Method of controlling security S30 the term of execution, the current aperture (S34) of real-time storage first expansion valve 141.Therefore, method of controlling security S30 the term of execution, combine with the correction aperture in the current aperture of the term of execution storage of method of controlling security S30.
Method of controlling security S30 is for opening or closing a method of proofreading and correct aperture from the current aperture of being stored.That is to say, by proofread and correct aperture reduce gradually first expansion valve 141 aperture, be higher than preset temperature up to the cold-producing medium discharge temperature of compressor 110.Along with the aperture of first expansion valve 141 reduces, the amount of cold-producing medium reduces, and it is hereby ensured the cold-producing medium discharge temperature of compressor 110.Therefore, can prevent liquid compression in the compressor 110.
Simultaneously, if method of controlling security S30 the term of execution compressor 110 the cold-producing medium discharge temperature turn back to normal operation range, then control module 200 switches to the first control method S20 to control the opening of first expansion valve 141 from method of controlling security S30.
If the cold-producing medium discharge temperature of compressor 110 drops in the default normal operation range, then control module 200 measurements are from the temperature of the cold-producing medium of indoor heat converter 120.If the temperature of the cold-producing medium by indoor heat converter 120 drops on outside the default normal operation range and is lower than preset temperature, then control module 200 switches to method of controlling security S30 from the first control method S20.When the first control method S20 switches to method of controlling security S30, in method of controlling security S30, determine to proofread and correct aperture, and will proofread and correct aperture and combine with current aperture according to the temperature of the cold-producing medium by indoor heat converter 120.Then, control the opening of first expansion valve 141 according to its associated value.Afterwards, the current aperture of first expansion valve 141 the term of execution of being stored in method of controlling security S30 in real time, and will proofread and correct aperture and combine with the current aperture of being stored the method for controlling security S30 term of execution.By proofread and correct aperture little by little increase first expansion valve 141 aperture, be higher than preset temperature up to the temperature of the cold-producing medium by indoor heat converter 120.By increasing the aperture of first expansion valve 141, can improve the temperature of the outlet side of indoor heat converter 120.
If the temperature of the cold-producing medium by indoor heat converter turns back to the temperature that is higher than preset temperature, then control module 200 switches to the first control method S20 to control the opening of first expansion valve 141 from method of controlling security S30.
In addition, if the temperature of the cold-producing medium by indoor heat converter 120 drops in the default normal operation range, the discharge temperature of then measuring compressor 110 too increases with the discharge temperature that prevents compressor 110.If the discharge temperature of compressor 110 drops on outside the normal operation range and surpasses preset temperature, then control module 200 switches to method of controlling security S30 from the first control method S20.In method of controlling security S30, with proofread and correct aperture with the first control method S20 the term of execution first expansion valve 141 stored aperture combine, to control the opening of first expansion valve 141.Afterwards, real-time storage method of controlling security S30 the term of execution the current aperture of first expansion valve 141, and will proofread and correct aperture and combine with the term of execution aperture of being stored at method of controlling security S30.The aperture of first expansion valve 141 increases gradually by proofreading and correct aperture, is lower than preset temperature up to the discharge temperature of compressor 110.By increasing the aperture of first expansion valve 141, can prevent that the discharge temperature of compressor 110 from increasing.Therefore, can prevent the damage of compressor 110.
Be lower than preset temperature if the cold-producing medium discharge temperature of compressor 110 drops to, then control module 200 switches to the first control method S20 to control the opening of first expansion valve 141 from method of controlling security S30.
In the first control method S20,, and reach the target aperture once with the current aperture of first expansion valve 141 target setting aperture irrespectively.Therefore, if air-conditioning is in the normal operating state, then with control first expansion valve 141 with the second control method S30 and compare, can control more rapidly.
On the other hand, in method of controlling security S30, reduce or increase gradually the aperture of first expansion valve 141 gradually.Therefore,, then more accurately control the opening of first expansion valve 141, the feasible thus easier normal operating state that turns back to according to mode of operation if air-conditioning 100 is not in normal operating state.
Simultaneously, control module 200 is the opening of control second expansion valve 142 so, makes the degree of superheat can reach the default target degree of superheat.Control module 200 can be controlled the opening of second expansion valve 142 by the correction target degree of superheat, so that guarantee the discharge temperature of compressor 110 after the initialization of second expansion valve 142.That is to say, after the initialization of second expansion valve 142, if the discharge temperature of compressor 110 is lower than preset temperature, then control module 200 can be set a new target degree of superheat by the default target degree of superheat is proofreaied and correct a predetermined value, and therefore can control the opening of second expansion valve 142.Therefore, after the initialization of second expansion valve 142, can guarantee the discharge temperature of compressor 110.
Afterwards, if the discharge temperature of compressor 110 is higher than preset temperature, then control module 200 can be controlled the opening of second expansion valve 142 so that reach the default target degree of superheat.
Simultaneously, in refrigerating operation, second expansion valve 142 is as first bloating plant of regulating intermediate pressure, and first expansion valve 142 is as second bloating plant of regulating the degree of superheat.
Therefore, in refrigerating operation, select among the first control method S20 and the method for controlling security S30, to control second expansion valve 142 according to mode of operation.That is to say, if operational parameter value drops in the normal operation range, then control second expansion valve 142 with the first control method S20, if operational parameter value drops on outside the normal operation range simultaneously, then the first control method S20 switches to method of controlling security S30 to control the opening of second expansion valve 142.
In other words, if the cold-producing medium discharge temperature of compressor 110 drops on outside the normal operation range and is lower than preset temperature, then the first control method S20 switches to method of controlling security S30.In method of controlling security S30, determine to proofread and correct aperture according to the cold-producing medium discharge temperature.And, little by little reduce the aperture of second expansion valve 142 by proofreading and correct aperture, be higher than preset temperature up to the cold-producing medium discharge temperature.Along with closing gradually of second expansion valve 142, can guarantee the cold-producing medium discharge temperature of compressor 110.
Further, drop on outside the normal operation range and be lower than preset temperature as the entrance side temperature of the indoor heat converter 120 of evaporimeter, the first control method S20 switches to method of controlling security S30.In method of controlling security S30, determine to proofread and correct aperture according to the entrance side temperature of indoor heat converter S30.And the aperture of second expansion valve 142 increases gradually by proofreading and correct aperture, drops in the normal operation range up to the entrance side temperature of indoor heat converter 120.Therefore, the pipeline that can prevent the entrance side place of indoor heat converter 120 freezes.
Further, if the discharge temperature of compressor 110 drops on outside the normal operation range and surpasses preset temperature, then the first control method S20 switches to method of controlling security S30.In method of controlling security S30, determine to proofread and correct aperture according to the discharge temperature of compressor 110.And the passing through of second expansion valve 142 increases gradually along with proofreading and correct aperture, is lower than preset temperature up to the discharge temperature of compressor 110.Therefore, the discharge temperature that can prevent compressor 110 too increases.
Also have, when air-conditioning 100 overloads, proofread and correct the default target degree of superheat so that set a new target degree of superheat by predetermined value, and therefore can control the opening of first expansion valve 141.Therefore, can deal with the overload of air-conditioning 100.
To the control method according to first and second expansion valves that are used for air-conditioning of fifth embodiment of the invention be described below.Following explanation concentrates on the difference with first embodiment.The Reference numeral identical with first embodiment represented identical member.
Be that with the difference of first embodiment control module 200 uses multiple different control method to regulate intermediate pressure.That is to say that control module 200 is by comparing the degree of superheat of cold-producing medium and the default target degree of superheat scope control method of first bloating plant that is identified for regulating intermediate pressure.Target degree of superheat scope is can be by default target degree of superheat scopes such as tests, and the circulation of air-conditioning can be stable in this scope.Control module 200 is by with the degree of superheat of cold-producing medium and target degree of superheat scope compares and therefore judge whether this circulation stablizes to determine control method.In other words, if the degree of superheat of cold-producing medium drops on outside the target degree of superheat scope, then control first bloating plant with the first control method S10, if and the degree of superheat of cold-producing medium drops in the default cold-producing medium target degree of superheat scope, then control first bloating plant with the fuzzy control method S40 that switches from the first control method S10.
At first, if air-conditioning is in the heating operation, then first expansion valve 141 is used as first bloating plant of regulating intermediate pressure, and second expansion valve 142 is as second bloating plant of regulating the degree of superheat.
Fig. 8 is a precedence diagram, demonstrates the control method of first expansion valve when the air-conditioning according to fifth embodiment of the invention is in the heating operation pattern.
With reference to Fig. 8, control module 200 initialization first expansion valve 141, the opening of regulating first expansion valve 141 then is to regulate intermediate pressure.At this moment, control module 200 selects among the first control method S10 and the fuzzy control method S40 any to control first expansion valve 141 according to the degree of superheat of cold-producing medium.
Whether the degree of superheat of checking cold-producing medium drops on outside the target degree of superheat scope (S41).If the degree of superheat of cold-producing medium drops on outside the target degree of superheat scope, then control module 200 is controlled first expansion valve 141 with the first control method S10.In the first control method S10, the value of detecting operation parameter (S11), and the calculating storage setting value (S12) corresponding with detected operational parameter value.According to setting value, determine the target aperture (S13) of first expansion valve.In case determine the target aperture, then increase or reduce opening once, make the aperture of the expansion valve 141 of winning can reach the target aperture (S14, S15).Therefore, the intermediate pressure of cold-producing medium can more promptly reach default intermediate pressure.The details of the first control method S10 is identical with first embodiment, therefore in this omission.
Simultaneously, if the degree of superheat of cold-producing medium drops in the default target degree of superheat scope, then control module 200 judges that the circulation of air-conditioning enters stabilization step.Therefore, control module 200 is controlled first expansion valve 141 with fuzzy control method S40, so that the intermediate pressure of cold-producing medium mates with the intermediate pressure of presetting more accurately.
In control module 200, store fuzzy table according to operational parameter value.In fuzzy control method S40, measure operational parameter value, and the opening of first expansion valve 141 is carried out fuzzy control according to fuzzy table.Here, will come exemplarily description operation parameter value by the pressure of ascending pipe 180.The opening of first expansion valve 141 changes continuously, reaches default intermediate pressure up to the pressure of ascending pipe 180.Can come from the temperature of the implantation temperature sensor 183 that is installed in the ascending pipe 180 and convert measured implantation temperature to pressure by measurement and guarantee the pressure of ascending pipe 180 (S42).Fuzzy table is stored in the control module 200 based on implantation temperature.According to this fuzzy table, control module 200 calculates the opening (S43) of first expansion valve 141, and changes the opening (S44) of first expansion valve 141.Afterwards, the opening of first expansion valve 141 is carried out FEEDBACK CONTROL, reach target intermediate pressure (S45) up to injection pressure.
Therefore, the first control method S10 is so a kind of method, wherein determines the target aperture of first expansion valve 141, and the opening of first expansion valve 141 opens once or increase, and reaches the target aperture up to the current aperture of first expansion valve 141.Fuzzy control method S40 is for changing the method for the opening of first expansion valve 141 gradually according to implantation temperature or pressure.That is to say, in fuzzy control method 40, compare, regulate the opening of first expansion valve 141 subtly with the first control method S10.
Therefore, if the degree of superheat of cold-producing medium drops on outside the target degree of superheat scope, then can be by the opening of using the first control method S10 to regulate first expansion valve 141 to a greater degree.If the degree of superheat of cold-producing medium drops in the target degree of superheat scope, then the opening by adopting fuzzy control method S40 to regulate first expansion valve 141 subtly makes the intermediate pressure of cold-producing medium mate with the intermediate pressure of presetting more accurately thus.
Simultaneously, if air-conditioning is in the refrigerating operation pattern, then second expansion valve 142 is used as first bloating plant of regulating intermediate pressure, and first expansion valve 141 is as second expansion valve of regulating the degree of superheat.
Therefore, in refrigerating operation, select a kind of among the first control method S10 and the fuzzy control method S40 to control second expansion valve 142 according to mode of operation.That is to say, if the degree of superheat of cold-producing medium drops on outside the target degree of superheat scope, then control second expansion valve 142, simultaneously with the first control method S10, if the degree of superheat of cold-producing medium drops in the target degree of superheat scope, then control second expansion valve 142 with fuzzy control method S40.
To the control method according to first and second expansion valves that are used for air-conditioning of sixth embodiment of the invention be described below.Following explanation concentrates on the difference with first embodiment.The Reference numeral identical with first embodiment represented identical member.
Be with the difference of first embodiment, the first control method S50 at first bloating plant that is used for controlling to adjust intermediate pressure, control module 200 is so controlled, the feasible target aperture that can determine first bloating plant, and aperture changes and can change according to the time of opening of first bloating plant then, reaches the target aperture up to the aperture of first bloating plant.
At first, if air-conditioning is in the heating operation, then first expansion valve 141 is used as first bloating plant of regulating intermediate pressure, and second expansion valve 142 is as second bloating plant of regulating the degree of superheat.
Fig. 9 is a precedence diagram, demonstrates the control method that is used for first expansion valve when the air-conditioning according to sixth embodiment of the invention is in the heating operation pattern.
With reference to Fig. 9, control module 200 is controlled the opening of first expansion valve 141 to regulate intermediate pressure after the initialization of finishing first expansion valve 141 with the first control method S50.In the first control method S50, so control, thereby determine the target aperture of first expansion valve 141, time of opening of changing according to first expansion valve 141 of aperture changes then, reach the target aperture up to the aperture of first expansion valve 141.
In the first control method S50, detect the value (S51) of at least one operating parameter.Control module 200 can obtain to be used for the setting value (S52) of this operational parameter value by form.Determine the target aperture (S53) of first expansion valve according to this setting value.Can obtain the target aperture by the combination of setting value.
Then, control module 200 detects and stores the current aperture (S54) of first expansion valve 141 in real time.The current aperture and the target aperture of being stored are compared (S55) mutually.If current aperture and target aperture differ from one another, then determine that according to the difference between current aperture and the target aperture aperture changes.Presetting aperture according to the difference between current aperture and the target aperture changes.The form that aperture is changed with form is stored in the control module 200.Therefore, the difference that control module 200 obtains between current aperture and target aperture, and from this form, obtain aperture variation (S56).
Change in case determine aperture, then change the aperture (S57) that changes first expansion valve 141 by this aperture.
Control module 200 detects the current aperture (S54) of first expansion valve 141 continuously.Then, once more the current aperture and the target aperture of first expansion valve 141 compared (S55) mutually.If current aperture is different with the target aperture, then calculates difference, and determine that according to this difference aperture changes (S56) once more.If determine that once more aperture changes, then change the aperture (S57) that changes first expansion valve by the aperture of determining once more.
Repeat said process, consistent with the target aperture or drop in the error range up to the current aperture of first expansion valve.
The diagram of Figure 10 illustrates aperture with the variation according to time of opening of first expansion valve of sixth embodiment of the invention.
With reference to Figure 10, aperture can be changed that B1, B2 and B3 are set as and current aperture and target aperture between difference proportional.That is to say, because the difference between current aperture and the target aperture is bigger at the starting stage place of expansion valve 141 openings control, so therefore aperture has realized control more rapidly with the variation increase of the time of opening.Thereafter, the aperture of first expansion valve is more near the target aperture, and then aperture just becomes more little with the variation of the time of opening, has realized more accurate control thus.
Therefore, in the first control method S50 according to four embodiment of the invention, the current aperture of considering first expansion valve determines that aperture changes B1, B2 and B3, and repeatedly control the opening of first expansion valve 141, current aperture up to first expansion valve 141 reaches the target aperture, the aperture of the expansion valve 141 of winning is increased gradually or reduces.In other words, because the amount of cold-producing medium increases gradually or reduces, so circulation can be more stable.
Simultaneously, if air-conditioning 100 drops on outside the normal operation range, then control module 200 switches to method of controlling security S60 to control first expansion valve 141 from the first control method S50.
In method of controlling security S60, whether detecting operation parameter---for example the temperature of the discharge temperature of the cold-producing medium of discharging from compressor 110 and the cold-producing medium by indoor heat converter 120---drops on (S61) outside the default normal operation range.
Drop on outside the default normal operation range, then if control module 200 switches to method of controlling security S60 to control first expansion valve 141 from the first control method S50 to operating parameter---for example the temperature of the discharge temperature of the cold-producing medium of discharging from compressor 110 and the cold-producing medium by indoor heat converter 120---.
In method of controlling security S60, determine correction aperture (S62) according to the value of operating parameter, and the aperture in will proofreading and correct aperture and being stored in the first control method S50 combines (S63) opening (S64) to control first expansion valve 141.Thereafter, during carrying out method of controlling security S60, the current aperture (S65) of real-time storage first expansion valve 141, and will proofread and correct aperture and combine the opening of controlling first expansion valve 141 with the term of execution current aperture of being stored at method of controlling security S60.
Therefore, if the operational parameter value of air-conditioning 10 drops on outside the normal operation range, the control method that then is used for first expansion valve 141 switches to other method, has improved the stability of system thus.
And, in the first control method S50, detect and store the current aperture of first expansion valve 141, and increase or reduce the aperture of first expansion valve 141 gradually, therefore make be easier to first control method 141 the term of execution switch to another control method.
Figure 11 is a precedence diagram, demonstrates first control method that is used for first expansion valve when the air-conditioning according to seventh embodiment of the invention is in the refrigerating operation pattern.Following explanation concentrates on the difference with the 6th embodiment.Represent identical member with the identical Reference numeral in the 6th embodiment.
Be to comprise change process and maintenance process with the difference of the 6th embodiment, in the change process, control module 200 change first expansion valve 141 aperture, reach the target aperture up to the aperture of first bloating plant, in maintenance process, control module 200 is maintained the aperture after the change.In other words, when determining aperture according to the difference between target aperture and the current aperture and change, change by aperture and to change aperture (S71)., stop to control first expansion valve 141, and the aperture of first expansion valve 141 is kept a preset time (S72) thereafter.Be used to change the time of aperture and be maintained this aperture then by having, thus can be when control first expansion valve so that circulation is more stable.
Can repeatedly carry out change process S71 and maintenance process S72, reach the target aperture up to the current aperture of first expansion valve 141.
The diagram of Figure 12 illustrates aperture with the variation according to time of opening of first expansion valve of seventh embodiment of the invention.
In one example, with reference to Figure 12, each that changes among process S71 and the maintenance process S72 is all carried out three times.In repeatedly change process, it is proportional that aperture variation C1, C2 and C3 are controlled to and open the time.That is to say,, increase, therefore realized control more rapidly so aperture changes the basis time of opening because the difference between current aperture and the target aperture is bigger at the starting stage place of expansion valve 141 openings control.Afterwards, along with the aperture of the increase of the time of opening and first expansion valve more near the target aperture, then aperture becomes more and more littler, has realized more accurate control thus.Also have, it is proportional that will the aperture in maintenance process repeatedly hold time T1, T2 and T3 are controlled to and open the time.That is to say, with aperture hold time be set at starting stage of first expansion valve, 141 openings the place longer.Afterwards, along with the time of opening increases gradually, hold time T1, T2 and T3 of aperture becomes less.And, aperture hold time T1, T2 and T3 can be set at change C1, C2 with aperture in the change process and C3 proportional.Therefore, the aperture of first expansion valve 141 changes more greatly, and then hold time T1, T2 and T3 of aperture is long more, makes thus to make this circulation more stable by the control to first expansion valve 141.
Though with reference to describing the present invention at the embodiment shown in these accompanying drawings, but these embodiments only are exemplary, and those skilled in the art will be understood that other embodiment that the present invention can have various remodeling and be equal to.Therefore, must determine real technology protection domain of the present invention according to the technical spirit of claims.
Claims (9)
1. air-conditioning system comprises:
Condenser, it is used for condensating refrigerant;
First bloating plant, it is used for the cold-producing medium of throttling by described condenser;
Second bloating plant is used for the cold-producing medium of throttling by described first bloating plant;
Evaporimeter, it is used to evaporate the cold-producing medium by described second bloating plant;
Compressor, its be used to compress by the cold-producing medium of described evaporimeter and between described first bloating plant and described second bloating plant cold-producing medium of injection after the shunting; And
Control module, the target aperture that it is used to detect the value of at least one operating parameter and determines described first bloating plant based on the storage setting value corresponding with the value of detected operating parameter;
Wherein said control module is stored the current aperture of described first bloating plant in real time, if and the value of at least one operating parameter drops on outside the default normal operation range, then described control module is controlled described first bloating plant with the method for controlling security that is used to change opening based on the current aperture of being stored.
2. air-conditioning system as claimed in claim 1, wherein said compressor comprises:
First compression unit, it is used to compress the cold-producing medium by described evaporimeter; And
Second compression unit, its be used to compress by the cold-producing medium of described first compression unit and between described first bloating plant and described second bloating plant cold-producing medium of injection after the shunting.
3. air-conditioning system as claimed in claim 1, wherein said control module is measured the degree of superheat of cold-producing medium in real time, and changes the aperture of described second bloating plant based on the degree of superheat of measuring, and reaches the default degree of superheat up to the degree of superheat of measuring.
4. air-conditioning system as claimed in claim 1, wherein said at least one operating parameter is a plurality of operating parameters, and described a plurality of operating parameter changes the target aperture of described first bloating plant independently.
5. air-conditioning system as claimed in claim 1, wherein said control module is controlled, and makes the variation of aperture change according to time of opening of described first bloating plant, reaches the target aperture up to the aperture of described first bloating plant.
6. air-conditioning system as claimed in claim 5, wherein said control module are carried out the maintenance process of the aperture of aperture after the aperture of described first bloating plant reaches the change process of target aperture and keeps change that changes described first bloating plant.
7. air-conditioning system as claimed in claim 6, wherein at least some described change processes, the variation of aperture is controlled to according to the time of opening and changes, and in described maintenance process, aperture is held time to be controlled to according to aperture and changed.
8. air-conditioning system as claimed in claim 1, wherein in described method of controlling security, determine to proofread and correct aperture based on the value of described operating parameter, and control the opening of described first bloating plant by described correction aperture is combined with the current aperture of being stored.
9. air-conditioning system as claimed in claim 1, if wherein the degree of superheat of cold-producing medium drops in the preset range of the target degree of superheat, then described control module carries out fuzzy control to the opening of described first bloating plant.
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| Application Number | Priority Date | Filing Date | Title |
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| KR1020080000218 | 2008-01-02 | ||
| KR10-2008-0000217 | 2008-01-02 | ||
| KR1020080000218A KR101321543B1 (en) | 2008-01-02 | 2008-01-02 | Air conditioning system |
| KR1020080000217A KR101336720B1 (en) | 2008-01-02 | 2008-01-02 | Air conditioning system |
| KR10-2008-0000218 | 2008-01-02 | ||
| KR1020080000217 | 2008-01-02 |
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| CN110081627B (en) | 2011-06-13 | 2022-05-10 | 阿雷斯科技术有限公司 | Refrigeration system and method for refrigeration |
| RU2017112546A (en) | 2011-06-13 | 2019-01-25 | Ареско Текнолоджиз, Ллс | CONDENSER EVAPORATION SYSTEM AND METHOD OF OPERATION |
| CN103423836B (en) * | 2012-04-24 | 2018-03-13 | 杭州三花研究院有限公司 | Vehicle air conditioner control method for overheat and vehicle air conditioner |
| CN104101125B (en) * | 2013-04-09 | 2016-10-05 | 珠海格力电器股份有限公司 | Air-conditioner |
| JP6321363B2 (en) * | 2013-12-06 | 2018-05-09 | シャープ株式会社 | Air conditioner |
| JP2017044454A (en) * | 2015-08-28 | 2017-03-02 | 三菱重工業株式会社 | Refrigeration cycle device and control method for the same |
| CN105371514B (en) * | 2015-12-10 | 2018-05-18 | 珠海格力电器股份有限公司 | Compressibility, air-conditioning system with second vapor injection and its judge control method |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4617804A (en) * | 1985-01-30 | 1986-10-21 | Hitachi, Ltd. | Refrigerant flow control device |
| EP0976991B1 (en) * | 1998-07-31 | 2003-06-11 | Zexel Valeo Climate Control Corporation | Refrigerating cycle |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100857794B1 (en) * | 2006-01-06 | 2008-09-09 | 엘지전자 주식회사 | Air-conditioning system and Controlling Method for the same |
| KR20070082501A (en) * | 2006-02-15 | 2007-08-21 | 엘지전자 주식회사 | Air-conditioning system and controlling method for the same |
-
2008
- 2008-01-02 KR KR1020080000217A patent/KR101336720B1/en active IP Right Grant
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4617804A (en) * | 1985-01-30 | 1986-10-21 | Hitachi, Ltd. | Refrigerant flow control device |
| EP0976991B1 (en) * | 1998-07-31 | 2003-06-11 | Zexel Valeo Climate Control Corporation | Refrigerating cycle |
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| KR20090074437A (en) | 2009-07-07 |
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